Method and apparatus for reporting user equipment capability in wireless communication system

ABSTRACT

Provided are a method and apparatus for reporting UE capability in a wireless communication system, and an operation method of a UE in the wireless communication system includes receiving a UE capability inquiry message including information about a new radio (NR) frequency band from a BS, generating UE capability information by considering an additional UE capability supported for a supplementary uplink (SUL) as being equal to an additional UE capability supported for frequency division duplex (FDD) when the information about the NR frequency band includes information about a frequency band related to the SUL and the UE supports the frequency band related to the SUL, and transmitting the generated UE capability information to the BS.

TECHNICAL FIELD

The present disclosure relates to a method and apparatus for reportinguser equipment capability in a wireless communication system.

BACKGROUND ART

To meet the demand with respect to ever-increasing wireless data trafficsince the commercialization of the 4th generation (4G) communicationsystem, there have been efforts to develop an advanced 5th generation(5G) or pre-5G communication system. For this reason, the 5G or pre-5Gcommunication system is also called a beyond fourth generation (4G)network communication system or post long-term evolution (LTE) system.Implementation of the 5G communication system using ultrahigh frequency(millimeter wave (mmWave)) bands, e.g., 60 giga hertz (GHz) bands, isbeing considered to attain higher data transfer rates. To reducepropagation loss of radio waves and increase a transmission range ofradio waves in the ultrahigh frequency bands, beamforming, massivemultiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO),array antenna, analog beamforming, and large-scale antenna techniquesare under discussion. To improve system networks, technologies foradvanced small cells, cloud radio access networks (RANs), ultra-densenetworks, device to device (D2D) communication, wireless backhaul,moving networks, cooperative communication, coordinated multi-points(CoMP), interference cancellation and the like are also being developedin the 5G communication system. In addition, in the 5G system, anadvanced coding modulation (ACM), e.g., hybrid FSK and QAM modulation(FQAM), sliding window superposition coding (SWSC), and an advancedaccess technology, e.g., filter bank multi carrier (FBMC),non-orthogonal multiple access (NOMA), and sparse code multiple access(SCMA) are being developed.

In the meantime, the Internet is evolving from a human-orientedconnectivity network where humans generate and consume information to anInternet of things (IoT) network where distributed entities or thingssend, receive and process information without human intervention.Internet of Everything (IoE) technologies, in which a big dataprocessing technology through connection with a cloud server, forexample, are combined with an IoT technology, have also emerged. Toimplement IoT, various technologies, such as a sensing technology, awired/wireless communication and network infrastructure, a serviceinterfacing technology, and a security technology are required, and eventechnologies for sensor networks, machine to machine (M2M)communication, machine type communication (MTC) for connection betweenthings are being studied these days. In the IoT environment, intelligentinformation technology (IT) services that create new values for humanlife by collecting and analyzing data generated from connected thingsmay be provided. IoT may be applied to a variety of areas, such as smarthomes, smart buildings, smart cities, smart cars or connected cars,smart grids, health care, smart home appliances and advanced medicalservices through convergence and combination between existing ITtechnologies and various industrial applications.

In this regard, various attempts to apply the 5G communication system tothe IoT network are being made. For example, technologies regardingsensor network, M2M, MTC, etc., are implemented by the 5G communicationtechnologies, such as beamforming, MIMO, array antenna schemes, etc.Even application of a cloud radio access network (cloud RAN) as theaforementioned big data processing technology may be an example ofconvergence of 5G and IoT technologies.

With the development of the aforementioned technologies and wirelesscommunication systems, it is possible to provide various services, andthus, there is a need for a method for seamlessly providing theservices.

DESCRIPTION OF EMBODIMENTS Solution to Problem

Based on the aforementioned discussion, the present disclosure providesan apparatus and method for effectively reporting user equipmentcapability in a wireless communication system.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1A illustrates a structure of a next generation mobilecommunication system to which the present disclosure is applied.

FIG. 1B illustrates a radio protocol architecture of a next generationmobile communication system to which the present disclosure isapplicable.

FIG. 1C illustrates messages related to user equipment (UE) capabilityreporting in a new radio (NR) system.

FIG. 1D illustrates UE operations to store and deliver a UE capabilitywhen the UE receives a UE capability information request from a basestation (BS) in a wireless communication system, according to anembodiment of the present disclosure.

FIG. 1E illustrates operations to deliver UE capability information whenthe UE receives a UE capability information request from a BS in awireless communication system, according to an embodiment of the presentdisclosure.

FIG. 1F illustrates a first method of delivering a difference in UEcapability for supplementary downlink (SDL) and supplementary uplink(SUL) in a wireless communication system, according to a firstembodiment of the present disclosure.

FIG. 1G illustrates a second method of delivering a difference in UEcapability for SDL and SUL in a wireless communication system, accordingto a second embodiment of the present disclosure.

FIG. 1H illustrates a method of delivering a difference in UE capabilitydepending on xDD and FRx, in a wireless communication system, accordingto a third embodiment of the present disclosure.

FIG. 1I illustrates operations of a BS and a core network in a wirelesscommunication system, according to an embodiment of the presentdisclosure.

FIG. 1J illustrates a block configuration of a UE in a wirelesscommunication system, according to an embodiment of the presentdisclosure.

FIG. 1K illustrates a block configuration of a BS in a wirelesscommunication system, according to an embodiment of the presentdisclosure.

FIG. 2 is a block diagram illustrating a configuration of a UE in awireless communication system, according to an embodiment of the presentdisclosure.

FIG. 3 is a block diagram illustrating a configuration of a BS in awireless communication system, according to an embodiment of the presentdisclosure.

BEST MODE

According to an embodiment of the present disclosure, an operationmethod of a user equipment (UE) in a wireless communication systemincludes receiving a UE capability inquiry message including informationabout a new radio (NR) frequency band from a base station (BS),generating UE capability information by considering an additional UEcapability supported for a supplementary uplink (SUL) as being equal toan additional UE capability supported for frequency divisional duplex(FDD) when the information about the NR frequency band includesinformation about a frequency band related to the SUL and the UEsupports the frequency band related to the SUL, and transmitting thegenerated UE capability information to the BS.

According to an embodiment of the present disclosure, a UE in a wirelesscommunication system includes a transceiver, and at least one processorconfigured to receive a UE capability inquiry message includinginformation about an NR frequency band from a BS through thetransceiver, generate UE capability information by considering anadditional UE capability supported for an SUL as being equal to anadditional UE capability supported for FDD when the information aboutthe NR frequency band includes information about a frequency bandrelated to the SUL and the UE supports the frequency band related to theSUL, and transmit the generated UE capability information to the BSthrough the transceiver.

MODE OF DISCLOSURE

Embodiments of the present disclosure will now be described in detailwith reference to accompanying drawings. In the description of thepresent disclosure, when it is determined that a detailed description ofassociated commonly-used technologies or structures may unnecessarilyobscure the subject matter of the present disclosure, the detaileddescription will be omitted. Further, the terms, as will be mentionedlater, are defined by taking functionalities in the present disclosureinto account, but may vary depending on practices or intentions of usersor operators. Accordingly, the terms should be defined based ondescriptions throughout this specification.

Advantages and features of the present disclosure, and methods forattaining them will be understood more clearly with reference to thefollowing embodiments of the present disclosure, which will be describedin detail later along with the accompanying drawings. The embodiments ofthe present disclosure may, however, be embodied in many different formsand should not be construed as limited to the embodiments set forthherein; rather, these embodiments of the present disclosure are providedso that this disclosure will be thorough and complete, and will fullyconvey the scope of the embodiments of the present disclosure to thoseof ordinary skill in the art. Like numbers refer to like elementsthroughout the specification.

It will be understood that each block and combination of the blocks of aflowchart may be performed by computer program instructions. Thecomputer program instructions may be loaded on a processor of auniversal computer, a special-purpose computer, or other programmabledata processing equipment, and thus they generate means for performingfunctions described in the block(s) of the flowcharts when executed bythe processor of the computer or other programmable data processingequipment. The computer program instructions may also be stored incomputer-usable or computer-readable memories oriented for computers orother programmable data processing equipment, so it is possible tomanufacture a product that contains instruction means for performingfunctions described in the block(s) of the flowchart. The computerprogram instructions may also be loaded on computers or programmabledata processing equipment, so it is possible for the instructions togenerate a process executed by the computer or the other programmabledata processing equipment to provide steps for performing functionsdescribed in the block(s) of the flowchart.

Furthermore, each block may represent a part of a module, segment, orcode including one or more executable instructions to perform particularlogic function(s). It is noted that the functions described in theblocks may occur out of order in some alternative embodiments. Forexample, two successive blocks may be performed substantially at thesame time or in reverse order depending on the corresponding functions.

The term “module” (or sometimes “unit”) as used herein refers to asoftware or hardware component, such as field programmable gate array(FPGA) or application specific integrated circuit (ASIC), which performssome functions. However, the module is not limited to software orhardware. The module may be configured to be stored in an addressablestorage medium, or to execute one or more processors. For example, themodules may include components, such as software components,object-oriented software components, class components and taskcomponents, processes, functions, attributes, procedures, subroutines,segments of program codes, drivers, firmware, microcodes, circuits,data, databases, data structures, tables, arrays, and variables.Functions served by components and modules may be combined into asmaller number of components and modules, or further divided into alarger number of components and modules. Moreover, the components andmodules may be implemented to execute one or more central processingunits (CPUs) in a device or security multimedia card. In embodiments ofthe present disclosure, the module may include one or more processors.

Descriptions of some well-known technologies that possibly obscure thepresent disclosure will be omitted, if necessary. Embodiments of thepresent disclosure will now be described with reference to accompanyingdrawings.

Herein, terms to identify access nodes, terms to refer to networkentities, terms to refer to messages, terms to refer to interfaces amongnetwork entities, terms to refer to various types of identificationinformation, etc., are examples for convenience of explanation.Accordingly, the present disclosure is not limited to the terms asherein used, and may use different terms to refer to the items havingthe same meaning in a technological sense.

Some of the terms and names defined by the 3rd generation partnershipproject (3GPP) long term evolution (LTE) will be used hereinafter. Thepresent disclosure is not, however, limited to the terms anddefinitions, and may equally apply to any systems that conform to otherstandards. In particular, the present disclosure may be applied to the3GPP new radio (NR) (which is the 5th generation (5G) mobilecommunication standard). In the present disclosure, eNode B (eNB) may beinterchangeably used with gNode B (gNB). For example, a base stationreferred to as an eNB may also indicate a gNB. Furthermore, the term‘terminal’ or ‘user equipment (UE)’ may refer not only to a cell phone,an NB-IoT device, and a sensor but also to other wireless communicationdevices.

In the following description, a base station is an entity for performingresource allocation for a terminal, and may be at least one of a gNB, aneNB, a Node B, a base station (BS), a radio access unit, a base stationcontroller, or a network node. The terminal may include a user equipment(UE), a mobile station (MS), a cellular phone, a smart phone, acomputer, or a multimedia system capable of performing a communicationfunction. Obviously, it is not limited thereto.

The present disclosure relates to a method and apparatus for deliveringUE capabilities dedicated to uplink and downlink in a next generationmobile communication system.

The present disclosure relates to a mobile communication system, andmore particularly, to a method of reporting UE capability forUL-dedicated and DL-dedicated frequency bands when the UE reports itsown capability.

The present disclosure describes a series of processes in which a UEreceives a request for UE capability from a BS and reports the UEcapability to the BS in an NR system. In this case, a procedure forreporting a UE capability that varies depending on a duplex mode and afrequency range among UE capabilities may not be adequate. ForUL-dedicated and DL-dedicated frequency bands in particular, there is noprocedure for reporting UE capability. Hence, the present disclosureproposes a procedure for reporting the UE capability for theUL-dedicated and DL-dedicated frequency bands.

Through the procedure proposed in the present disclosure, an NR UE mayreport different UE capabilities for the UL-dedicated and DL-dedicatedfrequency bands when the NR UE reports its capability.

FIG. 1A illustrates a structure of a next generation mobilecommunication system to which the present disclosure is applied.

Referring to FIG. 1A, a wireless access network of the next generationmobile communication system may include a next generation base station(NR gNB) 1 a-10 and a new radio core network (NR CN) or next generationcore network (NG CN) 1 a-05. A UE or a new radio UE (NR UE) 1 c-15 mayaccess an external network via the NR gNB 1 a-10 and the NR CN 1 a-05.

In FIG. 1A, the NR gNB 1 a-10 may correspond to an evolved Node B (eNB)of the existing LTE system. The NR gNB 1 a-10 may be connected to the NRUE 1 a-15 on a radio channel, and may provide much better services thanthe existing node B does. In the next generation mobile communicationsystem, all user traffic may be served on a shared channel, so a deviceto collect status information, such as buffer status of UEs, availabletransmission power status, channel condition, etc., for scheduling isrequired, and the NR gNB 1 a-10 may serve as the device. A single NR gNB1 a-10 may generally control a number of cells. To attain ultrahighspeed data transfer as compared to LTE, more than the existing maximumbandwidth may be used, and an additional beamforming technology may beintegrated with an orthogonal frequency division multiplexing (OFDM)radio access technology. Furthermore, an adaptive modulation and coding(AMC) scheme that determines a modulation scheme and a channel codingrate according to the channel condition of the UE may be used. The NR CN1 a-05 may perform functions such as mobility support, bearer setup, QoSsetup, etc. The NR CN 1 a-05 is a device responsible for various controlfunctions as well as mobility management functionality for the UE, andmay be connected to a number of BSs. Moreover, the next generationmobile communication system may cooperate even with the LTE system, inwhich case the NR CN 1 a-05 may be connected to a mobility managemententity (MME) 1 a-25 through a network interface. The MME 1 a-25 may beconnected to the eNB 1 a-30, which is an existing BS.

FIG. 1B illustrates a radio protocol architecture of a next generationmobile communication system to which the present disclosure isapplicable.

Referring to FIG. 1B, a radio protocol of a next generation mobilecommunication system in each of a UE and an NR gNB may include an NRservice data adaptation protocol (NR SDAP)) 1 b-01 or 1 b-45, an NRPacket Data Convergence Protocol (NR PDCP)) 1 b-05 or 1 b-40, an NRRadio Link Control (NR RLC)) 1 b-10 or 1 b-35, and an NR Medium AccessControl (NR MAC)) 1 b-15 or 1 b-30.

Main functions of the NR SDAP 1 b-01 or 1 b-45 may include some of thefollowing functions:

-   -   transfer of user plane data    -   mapping between a quality of service (QoS) flow and a data radio        bearer (DRB) for both UL and DL    -   marking a QoS flow identity (ID) for both UL and DL packets    -   mapping of a reflective QoS flow to a DRB for UL SDAP PDUs.

For an SDAP layer device, the UE may be configured as to whether to usea header of the SDAP layer device or whether to use a function of theSADP layer device for each PDCP layer device or each bearer or eachlogical channel based on an RRC message. Furthermore, when the SDAPheader is configured, a 1-bit non-access stratum (NAS) reflective QoSindicator (NAS reflective QoS) and a 1-bit access stratum (AS)reflective QoS indicator (AS reflective QoS) may indicate for the UE toupdate or reconfigure the mapping information of the QoS flow and thedata bearer for UL or DL. The SDAP header may include QoS flow IDinformation indicating a QoS. The QoS information (e.g., QoS flow IDInformation) may be used for data process priority, schedulinginformation, etc., for smooth services.

Main functions of the NR PDCP layer 1 b-05 or 1 b-40 may include some ofthe following functions:

-   -   header compression and decompression (e.g., header compression        and decompression: ROHC only)    -   user data transfer    -   sequential delivery (e.g., in-sequence delivery of higher layer        PDUs)    -   non-sequential delivery (e.g., out-of-sequence delivery of        higher layer PDUs)    -   reordering (e.g., PDCP PDU reordering for reception)    -   duplicate detection (e.g., duplicate detection of lower layer        SDUs)    -   retransmission (e.g., retransmission of PDCP SDUs)    -   ciphering and deciphering    -   timer-based SDU discarding (e.g., timer-based SDU discarding in        uplink)

The reordering of the NR PDCP device may refer to a function ofreordering PDCP PDUs received from a lower layer based on PDCP sequencenumbers (SNs). The reordering of the NR PDCP device may include afunction of transferring data to a higher layer in the reorderedsequence or transferring the data directly to the higher layer withoutconsidering the sequence. Moreover, the reordering of the NR PDCP devicemay include a function of reordering the sequence to record missing PDCPPDUs, a function of reporting status of missing PDCP PDUs to atransmitting end, or a function of requesting retransmission of missingPDCP PDUs.

Main functions of the NR RLC 1 b-10 or 1 b-35 may include some of thefollowing functions:

-   -   data transfer (e.g., transfer of higher layer PDUs)    -   sequential delivery (e.g., in-sequence delivery of higher layer        PDUs)    -   non-sequential delivery (e.g., out-of-sequence delivery of        higher layer PDUs)    -   ARQ (e.g., error correction through ARQ)    -   concatenation, segmentation, and reassembling (e.g.,        concatenation, segmentation and reassembly of RLC SDUs)    -   re-segmentation (e.g., re-segmentation of RLC data PDUs)    -   reordering (e.g., reordering of RLC data PDUs)    -   duplicate detection    -   error detection (e.g., protocol error detection)    -   RLC SDU discard    -   RLC re-establishment

In the aforementioned sequential delivery function (in-sequencedelivery) of the NR RLC device may refer to a function of delivering RLCSDUs received from a lower layer to a higher layer in sequence. Thesequential delivery function of the NR RLC device may include a functionof receiving, reassembling and delivering multiple RLC SDUs resultingfrom segmentation of one original RLC SDU, a function of reordering thereceived RLC PDUs based on RLC SNs or PDCP SNs, a function of reorderingthe sequence to record missing RLC PDUs, a function of reporting statusof missing RLC PDUs to a transmitting end, a function of requestingretransmission of missing PDCP PDUs, a function, when there is a missingRLC SDU, of delivering RLC SDUs before the missing RLC SDU to a higherlayer in sequence, a function, when there is a missing RLC SDU but atimer is expired, of delivering all RLC SDUs received before the timerstarts to a higher layer in sequence, or a function, when there is amissing RLC SDU but a timer is expired, of delivering all RLC SDUsreceived up to present to a higher layer in sequence. Furthermore, thesequential delivery of the NR RLC device may include a function ofdelivering RLC PDUs to a PDCP device regardless of the sequence(out-of-sequence delivery) by processing the RLC PDUs in the order ofreception (or in the order of arrival without regard to the order of theSNs), or a function, when the RLC PDU is segmented, of reassembling thesegments stored in a buffer or to be received later into one completeRLC PDU, processing and delivering the RLC PDU to a PDCP device. The NRRLC layer may not include the concatenation function, and theconcatenation function may be performed in the NR MAC layer or replacedwith the multiplexing function of the NR MAC layer.

The non-sequential delivery function of the NR RLC device may refer to afunction of delivering RLC SDUs received from a lower layer directly toa higher layer without regard to the sequence of the RLC SDUs, andinclude a function of receiving, reassembling and delivering multipleRLC SDUs resulting from segmentation of an original RLC SDU, and afunction of storing RLC SNs or PDCP SNs of the received RLC PDUs andreordering the received RLC PDUs to record missing RLC PDUs.

The NR MAC layer 1 b-15 and 1 b-30 may be connected to multiple NR RLClayer devices configured in the same UE, and main functions of the NRMAC layer 10-40 and 10-55 may include some of the following functions:

-   -   mapping (e.g., mapping between logical channels and transport        channels)    -   multiplexing and demultiplexing function (e.g.,        multiplexing/demultiplexing of MAC SDUs)    -   scheduling information report function    -   HARQ (e.g., error correction through HARQ)    -   logical channel priority control (e.g., priority handling        between logical channels of one UE)    -   UE priority control function (e.g., priority handling between        UEs by means of dynamic scheduling)    -   MBMS service identification    -   transport format selection    -   padding

The NR PHY layer 1 b-20 or 1 b-25 may perform channel coding andmodulation on higher layer data, form the data into OFDM symbols andsend them on a radio channel, or may demodulate OFDM symbols received ona radio channel, perform channel decoding on them and send the result toa higher layer.

FIG. 1C illustrates messages related to UE capability reporting in an NRsystem. Specifically, FIG. 1C illustrates a message structure forreporting UE capability in an NR system, and more particularly, anoperation in which the UE sends the UE capability according to UEcapability request filtering of the BS.

Basically, a UE 1 c-01 may perform a procedure for reporting acapability supported by the UE to a serving gNB 1 c-02 (hereinafter,gNB) while connected to the gNB 1 c-02. In operation 1 c-05, the gNB maysend a UE capability inquiry message requesting to report a capabilityto the UE in the connected state. The UE capability inquiry message mayinclude a UE capability request for each radio access technology (RAT)type requested by the gNB to the UE. The request for each RAT type mayinclude requested frequency band information according to priority.Furthermore, the UE capability inquiry message may be used to request aplurality of RAT types using one RRC message container. Alternatively,the gNB may send the UE capability inquiry message including the requestfor each RAT type to the UE multiple times. Specifically, the UEcapability inquiry of operation 1 c-05 may be repeated multiple times,and the UE may then configure a corresponding UE capability informationmessage to match a response to the request, and report the matchedresponse. In the next generation mobile communication system, a requestfor UE capability for NR, LTE, evolved-universal terrestrial radioaccess new radio dual connectivity (EN-DC), and multi-radio dualconnectivity (MR-DC) may be performed. For reference, it is common toinitially transmit the UE capability inquiry message after the UE isconnected to the gNB and the gNB is aware of the connection, but the UEcapability inquiry message may be transmitted in any condition whenrequired by the gNB.

Upon receiving a request to report the UE capability from the gNB inoperation 1 c-05, the UE may configure a UE capability according to anRAT type and frequency band information requested from the gNB. In otherwords, the UE may receive the UE capability inquiry message from thegNB, and configure a UE capability based on RAT type information andfrequency band information included in the UE capability inquirymessage. How the UE configures a UE capability in an NR system isdescribed as follows:

1. When the UE receives a request for a UE capability for some or all ofRAT types including LTE, EN-DC and NR from the gNB, and simultaneouslyreceive a list of LTE and NR frequency bands, the UE may configure aband combination for EN-DC and NR stand-alone (SA). Specifically, the UEmay configure a candidate BC list for the EN-DC and NR SA based onfrequency bands requested from the BS in FreqBandList. The configuringof the candidate BC list may be defined as a candidate band combinationcompiling operation. Furthermore, priorities of the bands may be set inan order listed in FreqBandList. The configuring of the candidate BClist may be performed once regardless of the RAT type or may beperformed repeatedly for each RAT type.

In the following operations, a procedure corresponding to each RAT typemay be performed, in which case priorities are given in the order of NR,MR-DC and LTE.

2. When an “eutra-nr-only” flag or an “eutra” flag is set for the RATtype of the UE capability request message, the UE may totally discardthings about NR SA BCs from the configured candidate BC list. This mayhappen only when an LTE eNB requests an “eutra” capability.

3. Subsequently, the UE may discard fallback BCs from the candidate BClist configured in the above operation. The fallback BC corresponds to asuper set BC from which a band corresponding to at least one SCell iseliminated, and may be omitted because the super set BC may alreadycover the fallback BC. This operation (3) may also be applied to EN-DC,i.e., even LTE bands. The remaining BCs after this operation may referto a final “candidate BC list”.

4. The UE may select BCs to be reported by selecting BCs that suit therequested RAT type from the final “candidate BC list”. In thisoperation, the UE may configure supportedBandCombinationList in a setorder. Specifically, the UE may configure BCs and UE capability to bereported in a preset RAT type order. The preset RAT type order may referto a sequence of nr, eutra-nr, and eutra. Furthermore, the UE mayconfigure featureSetCombination for the configuredsupportedBandCombinationList, and configure a “candidate feature setcombination” list from the candidate BC list from which a list of thefallback BCs (including equal or low-level capability) is eliminated.The “candidate feature set combinations” include all feature setcombinations for NR and EUTRA-NR BCs, and may be obtained from featureset combinations of UE-NR-Capabilities and UE-MRDC-Capabilitiescontainers.

5. Furthermore, when the requested RAT type is eutra-nr, which affectssupportedBandCombination of the corresponding EN-DC or MR-DC,featureSetCombinations may be set according to the associated RAT typeand may all be included in two containers of UE-MRDC-Capabilities andUE-NR-Capabilities. However, a feature set of NR may only includeUE-NR-Capabilities.

After the UE capability is configured, the UE may transmit a UEcapability information message including the UE capability to the gNB,in operation 1 c-10. The BS may then perform scheduling andtransmission/reception management suitable for the UE based on the UEcapability received from the UE. The operations of FIG. 1C illustrate amethod by which the UE delivers a UE capability corresponding to RFparameters. Operations of storing and delivering the UE's own normalcapability, e.g., UE capabilities for physical parameters, MACparameters, radio link control (RLC) parameters, packet data convergenceprotocol (PDCP) parameters, measurement/mobility parameters, etc., willbe described in connection with FIG. 1D.

FIG. 1D illustrates UE operations to store and deliver a UE capabilitywhen the UE receives a UE capability information request from a BS in awireless communication system, according to an embodiment of the presentdisclosure. In other words, FIG. 1D illustrates operations to store anddeliver a UE capability, which are applied to all UEs, when the UEreceives a UE capability information request from a gNB in an NR systemto which an embodiment of the present disclosure refers.

As described above in connection with FIG. 1C, when the UE receives a UEcapability request message from the gNB in operation 1 c-05, the UEgenerates UE capability information by considering a request included inassociated filtering, and add the generated UE capability information toa UE capability information message and send the UE capabilityinformation message to the gNB in operation 1 c-10. That is, a method bywhich the UE delivers a UE capability corresponding to RF parameters isillustrated in FIG. 1C. On the other hand, operations of storing anddelivering the UE's own normal capability, e.g., UE capabilities forphysical parameters, MAC parameters, RLC parameters, PDCP parameters,measurement/mobility parameters, etc., will be described in detail inconnection with FIG. 1D.

When the UE receives a UE information request from the gNB, the UE mayset all the fields included in UE-NR-Capability for UE capability inoperation 1 d-10. Specifically, in operation 1 d-10, information aboutphysical parameters, MAC parameters, RLC parameters, PDCP parameters,measurement/mobility parameters, and RF parameters may be set and addedto the UE capability. In operation 1 d-10, the UE may set theinformation to include only UE capability applicable to all duplex modesFDD and TDD and frequency ranges FR1 and FR2. In this case, FDD mayrefer to frequency division duplex and TDD may refer to time divisionduplex. FR1 may refer to frequency range 1 corresponding to an NRfrequency band equal to or less than 7.125 GHz, and FR2 may refer tofrequency range 2 corresponding to an NR frequency band above 7.125 GHz.For example, adding to the UE capability in operation 1 d-10 isdescribed in RRC standard ASN.1 as follows:

UE-NR-Capability ::= SEQUENCE {  accessStratumRelease AccessStratumRelease,  pdcp-Parameters  PDCP-Parameters, rlc-Parameters  RLC-Parameters OPTIONAL,  mac-Parameters MAC-Parameters OPTIONAL,  phy-Parameters  Phy-Parameters, rf-Parameters  RF-Parameters,  measAndMobParameters MeasAndMobParameters OPTIONAL,  fdd-Add-UE-NR-Capabilities UE-NR-CapabilityAddXDD-Mode OPTIONAL,  tdd-Add-UE-NR-Capabilities UE-NR-CapabilityAddXDD-Mode OPTIONAL,  fr1-Add-UE-NR-Capabilities UE-NR-CapabilityAddFRX-Mode OPTIONAL,  fr2-Add-UE-NR-Capabilities UE-NR-CapabilityAddFRX-Mode OPTIONAL,  featureSets  FeatureSetsOPTIONAL,  featureSetCombinations  SEQUENCE (SIZE(1..maxFeatureSetCombinations)) OF FeatareSetCombination OPTIONAL, lateNonCriticalExtension  OCTET STRING OPTIONAL,  nonCriticalExtension UE-NR-Capability-v1530 OPTIONAL } Phy-Parameters ::=  SEQUENCE { phy-ParametersCommon   Phy-ParametersCommon OPTIONAL, phy-ParametersXDD-Diff   Phy-ParametersXDD-Diff OPTIONAL, phy-ParametersFRX-Diff   Phy-ParametersFRX-Diff OPTIONAL, phy-ParametersFR1   Phy-ParametersFR1 OPTIONAL,  phy-ParametersFR2  Phy-ParamatersFR2 OPTIONAL } MeasAndMobParameters ::=    SEQUENCE { measAndMobParametersCommon    MeasAndMobParametersCommon OPTIONAL, measAndMobParametersXDD-Diff     MeasAndMobParametersXDD-Diff OPTIONAL, measAndMobParametersFRX-Diff     MeasAndMobParametersFRX-Diff OPTIONAL}

In operation 1 d-10, the UE may set information other thanfdd-Add-UE-NR-Capabilities, tdd-Add-UE-NR-Capabilities,fr1-Add-UE-NR-Capabilities, and fr2-Add-UE-NR-Capabilities. The fourfields listed above (e.g., fdd-Add-UE-NR-Capabilities,tdd-Add-UE-NR-Capabilities, fr1-Add-UE-NR-Capabilities, andfr2-Add-UE-NR-Capabilities) are containers in which to set and deliverthe UE capability when the UE capability is different depending on theduplex mode or frequency range. In other words, operation 1 d-10 mayinclude a procedure for setting and storing a UE capability applied incommon to all UEs, a UE capability applied in common to duplex modes, aUE capability applied in common to frequency ranges, etc. As manyparameters (e.g., physical parameters, MAC parameters, RLC parameters,PDCP parameters, measurement/mobility parameters or RF parameters) mayhave the same UE capability for all the UEs, all duplexing, allfrequency ranges as described above, in operation 1 d-10, the UE may setparameters that may have the same capability, helping a reduction insignaling.

Among the aforementioned UE capability information in particular,parameters listed in Table 1 below may refer to parameters included inPhy-Parameters and MeasAndMobParameters, which may have different UEcapability values depending on the duplex mode and the frequency range.Table 1 may represent whether a related feature is supported for an xDD(FDD or TDD) and an FRx (FR1 or FR2) depending on a container in whichit is included.

TABLE 1 Field name Value range dynamicSFI ENUMERATED {supported}twoPUCCH-F0-2-ConsecSymbols ENUMERATED {supported}twoDifferentTPC-Loop-PUSCH ENUMERATED {supported}twoDifferentTPC-Loop-PUCCH ENUMERATED {supported}dl-SchedulingOffset-PDSCH-TypeA ENUMERATED {supported}dl-SchedulingOffset-PDSCH-TypeB ENUMERATED {supported}ul-SchedulingOffset ENUMERATED {supported} handoverInterF ENUMERATED{supported} handoverLTE-EPC ENUMERATED {supported} handoverLTE-5GCENUMERATED {supported}

In other words, Table 1 represents UE capability parameters classifiedfor FRx or xDD.

In operation 1 d-20, when the UE supports both TDD and FDD, the UE maycheck whether there is an additional capability supported with anothervalue in addition to a UE capability applied in common to the entireduplex of FDD or TDD (e.g., a common UE capability). Furthermore, thereis a difference in UE capability, the UE may perform an operation ofsetting and delivering the UE capability in a TDD or FDD container.

According to an embodiment, operation 1 d-20 may be referred to as anFDD and TDD UE capability check operation, and in an embodiment,operation 1 d-20 may include operations 1 d-21, 1 d-22 and 1 d-23.Specifically, in operation 1 d-21, the UE may check whether a particularUE capability differs between FDD and TDD. When a UE capability that isdifferent from the common UE capability previously indicated is an FDDUE capability, the UE may deliver UE capability by adding UE capabilityto the FDD in an FDD additional UE capability(fdd-Add-UE-NR/MRDC-Capabilities), in operation 1 d-22. On the otherhand, in operation 1 d-21, the UE may check whether a particular UEcapability differs between FDD and TDD, and when a UE capability that isdifferent from the common UE capability previously indicated is a TDD UEcapability, the UE may deliver the UE capability by adding the UEcapability to the TDD in a TDD additional UE capability(tdd-Add-UE-NR/MRDC-Capabilities), in operation 1 d-23.

After operation 1 d-20 is performed, when the UE supports both FR1 andFR2 in operation 1 d-30, the UE may check an additional capabilitysupported for FR1 or FR2 in addition to the UE capability applied incommon to the aforementioned all frequency ranges (e.g., FR1 and RF2),and when there is a difference in UE capability, the UE may perform anoperation of setting and delivering the UE capability in the particularFR1 or FR2 container.

According to an embodiment, operation 1 d-30 may be referred to as anFR2 and FR2 UE capability check operation, and in an embodiment,operation 1 d-30 may include operations 1 d-31, 1 d-32 and 1 d-33.Specifically, in operation 1 d-31, the UE may check whether a particularUE capability differs between FR1 and FR2, and when a UE capability thatis different from the common UE capability previously indicated is anFR1 UE capability, the UE may deliver the UE capability by adding the UEcapability to the FR1 in an FR1 additional UE capability(fr1-Add-UE-NR/MRDC-Capabilities), in operation 1 d-32. On the otherhand, in operation 1 d-31, the UE may check whether a particular UEcapability differs between FR1 and FR2, and when a UE capability that isdifferent from the common UE capability previously indicated is an FR2UE capability, the UE may deliver the UE capability by adding the UEcapability to the FR2 in an FR2 additional UE capability(fr2-Add-UE-NR/MRDC-Capabilities), in operation 1 d-33.

The operation of checking a difference in UE capability for FDD and TDDin operation 1 d-20 and the operation of checking a difference in UEcapability for FR1 and FR2 in operation 1 d-30 are performed in separateprocedures and do not affect each other's procedure. That the UEsupports a particular capability in FR1 means supporting a relatedfunction in the FR1 band regardless of TDD or FDD, and on the contrary,that the UE supports a related function in TDD means supporting thefunction in all TDD bands regardless of FR1 or FR2. Specifically, in aparticular case (e.g., case 2 in Table 2 below, which does not supportFR1-TDD but only supports FR1-FDD and FR2-TDD), there is no signalpresent for the UE to indicate this. Table 2 below takes an example ofcombinations of FRx and xDD.

TABLE 2 Support combinations Not support combinations Case 0 none AllCase 1 FR1-TDD, FR2-TDD FR1-FDD Case 2 FR1- FDD, FR2-TDD FR1-TDD Case 3FR1-TDD, FR1-FDD, FR2-TDD None Case 4 FR2-TDD FR1-TDD, FR1-FDD Case 5FR1-TDD, FR1-FDD FR2-TDD Case 6 FR1-TDD FR1-FDD, FR2-TDD Case 7 FR1-FDDFR1-TDD, FR2-TDD

A method of delivering UE capability to represent the case of Table 2,i.e., a method of adding to and delivering UE capability information incombinations of FRx and xDD will be described in Table 3 below. In otherwords, Table 3 describes a signaling method for possible xDD-FRxcombinations.

TABLE 3 Combinations Combination required by Row FDD-ADD TDD-ADD FR1-ADDFR2-ADD supported by RAN2 RAN1 1 0 0 0 0 No- Differentiation Case 0 Case3: FR1-TDD/FR1-FDD/ FR2-TDD (no support of FR2-FDD would be implicitlyindicated by absent of FR2-FDD Band combination) 2 0 0 0 1 FR2-TDDFR2-FDD 3 0 0 1 0 FR1-TDD Case 5: FR1-TDD/FR1-FDD FR1-FDD 4 0 0 1 1Not-valid (No-Differentiation) 5 0 1 0 0 FR1-TDD Case 1 FR1-TDD/FR1-TDDFR2-TDD 6 0 1 0 1 FR2-TDD Case 4: FR2-TDD 7 0 1 1 0 FR1-TDD Case 6:FR1-TDD 8 0 1 1 1 Not-valid 9 1 0 0 0 FR1-FDD FR2-FDD 10 1 0 0 1 FR2-FDD11 1 0 1 0 FR1-FDD Case 7: FR1-FDD 12 1 0 1 1 Not-valid 13 1 1 0 0Not-valid 14 1 1 0 1 Not-valid 15 1 1 1 0 Not-valid 16 1 1 1 1 Not-validCase 2: FR1-FDD/FR2-TDD (not support FR1-TDD) If the UE has no FR1-TDDband combination, this combination would equal to row1. If the UE hasFR1-TDD band combination, this combination could not be supported incurrent signalling.

For reference, ‘No-Differenciation’ in Table 3 may mean that additionalUE capability information for certain FRx and xDD is not to be deliveredin a related container after common UE information for previous FRx andxDD is already delivered. ‘Not-valid’ may mean that related capabilitiesare all denoted with the same value in additional containers for FR1 andFR2 or that related capabilities are all set to the same value inadditional containers for FDD and TDD, which may not be valid UEcapability settings.

FIG. 1E illustrates operations to deliver UE capability information whenthe UE receives a UE capability information request from a BS in awireless communication system, according to an embodiment of the presentdisclosure.

Referring to FIG. 1E, in operation 1 e-10, the UE may camp on aparticular NR cell and may receive system information from the cell. Inoperation 1 e-20, the UE may perform RRC connection with the gNB. Inoperation 1 e-30, the UE may receive UECapabilityEnquiry message fromthe connected gNB. The UECapabilityEnquiry message may include filteringinformation such as an RAT type and a frequency. In operation 1 e-40,the UE may perform a procedure for generating UE capability information(e.g., UECapabilityInformation) in response to a UE capability requestmessage (e.g., UECapabilityEnquiry message). In embodiments of thepresent disclosure as will be described later, UE operations inoperation 1 e-40, i.e., in the operation of generating theUECapabilityInformation message will be described in more detail.

In operation 1 e-50, the UE may add the UE information message generatedin operation 1 e-40 to the UECapabilityInformation message and deliverthe message to the gNB. Upon receiving the UE capability information,the gNB may analyze and decode the information and then apply theresultant information to an RRC setting that takes into account the UEcapability.

In an embodiment, a partial operating band of FR1 may be for SUL/SDL butnot for FDD nor TDD. In other words, there are bands defined solely forUL and DL, but there is no way to indicate whether a particular featureis supported in the band. Table 4 below is a table that refers to TS38.101-1 and lists operating bands for FR1.

TABLE 4 NR operating Uplink (UL) Downlink (DL) Duplex band operatingband operating band Mode n1 1920 MHz-1980 MHz 2110 MHz-2170 MHz FDD n12699 MHz-716 MHz 729 MHz-746 MHz FDD n14 788 MHz-798 MHz 758 MHz-768 MHzFDD n18 815 MHz-830 MHz 860 MHz-875 MHz FDD n2 1850 MHz-1910 MHz 1930MHz-1990 MHz FDD n20 832 MHz-862 MHz 791 MHz-821 MHz FDD n25 1850MHz-1915 MHz 1930 MHz-1995 MHz FDD n28 703 MHz-748 MHz 758 MHz-803 MHzFDD n29 N/A 717 MHz-728 MHz SDL n3 1710 MHz-1785 MHz 1805 MHz-1880 MHzFDD n30³ 2305 Mhz-2315 MHz 2350 MHz-2360 MHz FDD n34 2010 MHz-2025 MHz2010 MHz-2025 MHz TDD n38 2570 MHz-2620 MHz 2570 MHz-2620 MHz TDD n391880 MHz-1920 MHz 1880 MHz-1920 MHz TDD n40 2300 MHz-2400 MHz 2300MHz-2400 MHz TDD n41 2496 MHz-2690 MHz 2496 MHz-2690 MHz TDD n48 3550MHz-3700 MHz 3550 MHz-3700 MHz TDD n5 824 MHz-849 MHz 869 MHz-894 MHzFDD n50 1432 MHz-1517 MHz 1432 MHz-1517 MHz TDD¹ n51 1427 MHz-1432 MHz1427 MHz-1432 MHz TDD n65 1920 MHz-2010 MHz 2110 MHz-2200 MHz FDD⁴ n661710 MHz-1780 MHz 2110 MHz-2200 MHz FDD n7 2500 MHz-2570 MHz 2620MHz-2690 MHz FDD n70 1695 MHz-1710 MHz 1995 MHz-2020 MHz FDD n71 663MHz-698 MHz 617 MHz-652 MHz FDD n74 1427 MHz-1470 MHz 1475 MHz-1518 MHzFDD n75 N/A 1432 MHz-1517 MHz SDL n76 N/A 1427 MHz-1432 MHz SDL n77 3300MHz-4200 MHz 3300 MHz-4200 MHz TDD n78 3300 MHz-3800 MHz 3300 MHz-3800MHz TDD n79 4400 MHz-5000 MHz 4400 MHz-5000 MHz TDD n8 880 MHz-915 MHz925 MHz-960 MHz FDD n80 1710 MHz-1785 MHz N/A SUL n81 880 MHz-915 MHzN/A SUL n82 832 MHz-862 MHz N/A SUL n83 703 MHz-748 MHz N/A SUL n84 1920MHz-1980 MHz N/A SUL n86 1710 MHz-1780 MHz N/A SUL n89 824 MHz-849 MHzN/A SUL n90 2496 MHz-2690 MHz 2496 MHz-2690 MHz TDD⁵ n91 832 MHz-862 MHz1427 MHz-1432 MHz FDD⁹ n92 832 MHz-862 MHz 1432 MHz-1517 MHz FDD⁹ n93880 MHz-915 MHz 1427 MHz-1432 MHz FDD⁹ n94 880 MHz-915 MHz 1432 MHz-1517MHz FDD⁹ n95⁸ 2010 MHz-2025 MHz N/A SUL

Referring to Table 4, a certain band set for SDL and SUL may or may notbe shared with TDD or FDD band.

-   -   SDL: N29 has no corresponding band. The other SDL bands have        corresponding TDD bands.    -   SUL: N95 has a corresponding TDD band (n34). The others have        corresponding FDD bands.

In the following description, first and second embodiments of thepresent disclosure propose how to denote UE capability for SDL and SULbands and respective solutions. Furthermore, as for a method ofsignaling a difference in UE capability for the aforementioned xDD andFRx, a third embodiment proposes a method of signaling a difference inUE capability for all combinations that may be configured with xDD andFRx that are not supported at present.

FIG. 1F illustrates a first method of delivering a difference in UEcapability for SDL and SUL in a wireless communication system, accordingto the first embodiment of the present disclosure.

A solution proposed in the present embodiment may refer to a method bywhich each frequency band for SDL and SUL is predefined in terms of UEcapability differentiation depending on TDD/FDD, and which follows theexisting TDD/FDD UE capability differentiation. Specifically, the firstembodiment may be divided into the following three options:

-   -   Option 1-1: associate SDL and SUL with TDD and FDD,        respectively, and apply the corresponding TDD/FDD signaling to        SDL and SUL as it is. (This is because all SDL bands except for        n29 are shared with TDD bands, and the SDL band may always be        used for the TDD band. This is because all SUL bands except for        n95 are shared with FDD, and the SUL may be based on operations        in the FDD band.)    -   Option 1-2: associate SDL with TDD and SUL with TDD or FDD, and        apply the corresponding TDD/FDD signaling to SDL and SUL as it        is. (This is a method of applying mapping diversity in that band        n34 of SUL may be TDD)    -   Option 1-3: instead of FDD-add and tdd-add, use FR1-FBSet1-Add        and FR1-FBSet2-Add. This is a method of defining FBSet1        (frequency band set 1) and FBSet2 (frequency band set 2) by        grouping particular bands in FR1, and when there is a difference        in UE capability for containers corresponding to FBSet1 and        FBSet2 or the UE capability belongs to a group, setting UE        capabilities. An example of this method is as follows:        -   FBSet1: allocate n29, n34, n75, n76, and n95 and set            associated UE capabilities        -   FBSet2: allocate n80, n81, n82, n83, n84, n86, and n89 and            set associated UE capabilities

A first embodiment of the present disclosure shown in FIG. 1F ischaracterized in that, in operation 1 e-40 of FIG. 1E performed by UE,the UE receives an NR band request for SDL and SUL and performs UEoperations for an occasion when the UE supports the SDL and SUL.

For example, when SDL is included in the requested NR band and the UEsupports the SDL, the UE may perform operations 1 f-10, 1 f-20 and 1f-30. In other words, operation 1 e-40 of FIG. 1E may include operations1 f-10, 1 f-20 and 1 f-30.

In operation 1 f-10, the UE may check whether a particular UE capabilityis different from configuration information of a predefined group forSDL, and when the SDL UE capability is the same as a UE capabilityindicated in the predefined group (e.g., TDD band or FBSet1) associatedwith SDL, the UE may not perform an operation of setting a difference inadditional UE capability as the UE takes into account the same UEcapability as that of the group associated with SDL, in operation 1f-20. Operation 1 f-10 is characterized in that option 1-1/1-2 followsthe same as the UE capability in the TDD band and associated signalingmay also follow the same as described in the previous Figure of thepresent disclosure.

When the SDL UE capability is different from UE capability indicated inthe predefined group associated with SDL (e.g., TDD band or FBSet1) inoperation 1 f-10, the UE may signal a difference of the UE capability bychanging the UE capability of the group associated with SDL (indicate adifference of TDD UE capability or indicate a difference of UEcapability of a particular band group) in operation 1 f-30. Separatelyfrom the aforementioned operations, the UE may perform a procedure forchecking a difference of UE capability for SUL and storing the UEcapability. For example, when SUL is contained in the requested NR bandand the UE supports the SUL, the UE may perform operations 1 f-40, 1f-50 and 1 f-60. In other words, operation 1 e-40 of FIG. 1E may includeoperations 1 f-40, 1 f-50 and 1 f-60.

For example, in operation 1 f-40, the UE may check whether a particularUE capability is different from configuration information of apredefined group for SUL, and when the SUL UE capability is the same asa UE capability indicated in the predefined group (e.g., FDD band, TDDband or FBSet2) associated with SUL, the UE may not perform an operationof setting an additional difference in UE capability as the UE takesinto account the same UE capability as that of the group associated withSUL, in operation 1 f-50. Operation 1 f-50 is characterized in thatoption 1-1/1-2 follows the same as the UE capability in the FDD band (orTDD for n95) and associated signaling may also follow the same asdescribed in the previous Figure of the present disclosure.

When the SUL UE capability is different from UE capability indicated inthe predefined group associated with SUL (e.g., FDD band or FBSet2) inoperation 1 f-40, the UE may signal a difference of the UE capability bychanging the UE capability of the group associated with SUL (indicate adifference of FDD/TDD UE capability or indicate a difference of UEcapability of a particular band group) in operation 1 f-60.

For all the aforementioned solutions, parameters classified intoparameters for UL and parameters for DL among the parameters listed inTable 1 may be signaled. Specifically, for SDL, parameters associatedwith DL (dl-SchedulingOffset-PDSCH-TypeA,dl-SchedulingOffset-PDSCH-TypeB, and ul-SchedulingOffset) may beincluded, and for SUL, parameters associated with UL(twoPUCCH-F0-2-ConsecSymbols, twoDifferentTPC-Loop-PUSCH, andtwoDifferentTPC-Loop-PUCCH) may be included. Furthermore, commonparameters (dynamicSFI, handoverInterF, handoverLTE-EPC, andhandoverLTE-5GC) may be included for SDL and SUL each.

FIG. 1G illustrates a second method of delivering a difference in UEcapability for SDL and SUL in a wireless communication system, accordingto a second embodiment of the present disclosure.

A solution proposed in the present embodiment may refer to a method bywhich to introduce separate containers in which to deliver UEcapabilities for SDL and SUL (i.e., introduce an SUL-Add container andan SDL-Add container), and set features included in the SUL-Addcontainer as being supported by SUL and set features included in theSDL-Add container as being supported by SDL. This is a clearer method,and UE operations for SUL and SDL may be clearly differentiatedaccording to the method according to the second embodiment. Among theparameters listed in Table 1 in particular, parameters for UL and DL maybe separated, classified into and stored in SUL-Add container andSDL-Add container, respectively. For example, for SDL, parametersassociated with DL (dl-SchedulingOffset-PDSCH-TypeA,dl-SchedulingOffset-PDSCH-TypeB, and ul-SchedulingOffset) may beincluded, and for SUL, parameters associated with UL(twoPUCCH-F0-2-ConsecSymbols, twoDifferentTPC-Loop-PUSCH, andtwoDifferentTPC-Loop-PUCCH) may be included. Furthermore, commonparameters (dynamicSFI, handoverInterF, handoverLTE-EPC, andhandoverLTE-5GC) may be included for SDL and SUL each.

According to an embodiment, the second embodiment of the presentdisclosure shown in FIG. 1G may be included in operation 1 e-40 of FIG.1E. For example, the UE may process SDL/SUL UE capability and performoperations 1 g-10, 1 g-20 and 1 g-30. In other words, operation 1 e-40of FIG. 1E may include operations 1 g-10, 1 g-20 and 1 g-30.

Referring to FIG. 1G, in operation 1 g-10, the UE may check whether aparticular UE capability is for SDL or SUL. For example, the UE maycheck whether the particular UE capability is different fromconfiguration information of a predefined group for SDL. When theparticular UE capability is an SDL UE capability, the UE may add whetherto support the SDL UE capability to an SDL-dedicated container (SDL-Addcontainer). When the particular UE capability is an SUL UE capability,the UE may add whether to support the SUL UE capability to anSUL-dedicated container (SUL-Add container) in operation 1 g-30. Throughthis, the UE may separate UE capability for SUL and SDL and signal theUE capability to the gNB.

FIG. 1H illustrates a method of delivering a difference in UE capabilitydepending on xDD and FRx, in a wireless communication system, accordingto a third embodiment of the present disclosure.

A solution proposed in the third embodiment of the present disclosuremay include introducing an extra container (fdd-fr1-tdd-fr2-Add) inwhich to deliver a difference in UE capability for all combinations ofxDD and FRx and denoting the difference in UE capability for anassociated occasion through the extra container when required. A casethat the difference in UE capability for the associated occasion needsto be reported may correspond to Case 2 in Table 2 above. In this case,Case 2 in Table 2 may refer to a case that a particular UE capability issupported by the UE for FR1-FDD and FR2-TDD but not for FR1-TDD.

For the third embodiment of the present disclosure shown in FIG. 1H,operation 1 e-40 of FIG. 1E may include operations 1 h-10, 1 h-20 and 1h-30. For example, when requested NR bands include FR1 FDD, FR1 TDD andFR2 bands and the UE supports the bands, the UE may perform operations 1h-10, 1 h-20 and 1 h-30.

For example, when the requested NR bands include FR1 FDD, FR1 TDD andFR2 bands and the UE supports the bands, the UE may check whether thereis a capability supported for FR1 FDD and FR2 TDD and not for FR1 TDD inthe physical layer capability in operation 1 h-10. When there is acapability supported for FR1 FDD and FR2 TDD but not for FR1 TDD, the UEmay set and add the capability to new fdd-fr1-tdd-fr2-Add without addingit to any of FR1-Add, FR2-Add, FDD-Add, and TDD-Add (or by adding it inconsideration of other FRx/xDD capabilities) in operation 1 h-20. On theother hand, when there is not a capability supported for FR1 FDD and FR2TDD but not for FR1 TDD, the UE may not newly set a difference in UEcapability but may report a UE capability previously set in common forxDD and FRx.

FIG. 1I illustrates operations of a gNB and a core network in a wirelesscommunication system, according to an embodiment of the presentdisclosure.

Referring to FIG. 1I, in operation 1 i-05, the gNB may perform an RRCconnection procedure. Specifically, when a certain UE camps on a cell,the associated gNB may perform the RRC connection procedure to have theUE switched into a connected state. A core network associated with thegNB may receive, through an NAS message (e.g., an ATTACH/REGISTRATIONREQUEST message), a UE capability identifier carried in the UE. The UEcapability identifier may include a manufacturer-based UE capability IDand a public land mobile network (PLMN)-based UE capability ID, orinclude only the manufacturer-based UE capability when the PLMN based UEcapability ID is not allocated.

In operation 1 i-10, the gNB may send UE capability request information.Specifically, the gNB may send a UE capability request message to theUE, and the message may include filtering information such as a RAT typeand a frequency.

In operation 1 i-15, the gNB may receive and analyze UE capabilityinformation. For example, the UE may send the UE capability informationto the gNB in response to the UE capability request message, and the gNBmay obtain UE capability by decoding and analyzing the received UEcapability information.

In operation 1 i-20, the gNB may identify a difference in UE capabilitydepending on the frequency band, duplex mode, and SDL/SUL and provideRRC configurations that suit the UE capability. For example, the gNB mayanalyze the received UE capability information to identify informationto be applied to the UE. Especially, in the present disclosure, the BSmay check that there is a difference in UE capability for SDL and SUL,which is then delivered, and may reflect the checked information to beused in RRC configuration.

FIG. 1J is a block diagram of a UE in a wireless communication system,according to an embodiment of the present disclosure.

As shown in FIG. 1J, the UE according to the embodiment of the presentdisclosure may include a transceiver 1 j-05, a multiplexer anddemultiplexer 1 j-15, various higher layer processors 1 j-20 and 1 j-25and a control message processor 1 j-30.

Referring to FIG. 1J, the transceiver 1 j-05 may receive data andcertain control signals on a forward channel of a serving cell andtransmit data and certain control signals on a backward channel. Whenmultiple serving cells are set up, the transceiver 1 j-05 may performdata transmission or reception and control signal transmission orreception through the multiple serving cells. The multiplexer anddemultiplexer 1 j-15 may serve to multiplex data generated in the higherlayer processors 1 n-20 and 1 n-25 or the control message processor 1j-30 or demultiplex data received from the transceiver 1 j-05 anddeliver the multiplexing or demultiplexing result to the higher layerprocessors 1 j-20 and 1 j-25 or the control message processor 1 j-30.The control message processor 1 j-30 may transmit or receive a controlmessage to or from a BS and perform a required operation. In anembodiment, the control message processor 1 j-30 may include a functionof processing a control message such as an RRC message and an MACcontrol element (CE), and an RRC message receiving function about CBRmeasurement report, resource pool, and UE operations. The higher layerprocessors 1 j-20 and 1 j-25 may refer to DRB devices and may beconfigured for each service. The higher layer processors may processdata generated in user services, such as File Transfer Protocol (FTP) orVoice over Internet Protocol (VoIP) and deliver the result to themultiplexer and demultiplexer 1 j-15, or process data delivered from themultiplexer and demultiplexer 1 j-15 and deliver the result to a higherlayer service application. The controller 1 j-10 may check a schedulingcommand, e.g., uplink grants received through the transceiver 1 j-05,and control the transceiver 1 j-05 and the multiplexer and demultiplexer1 j-15 to perform uplink transmission in a proper transmission resourceat a suitable point of time. Although the UE is shown as including aplurality of blocks, each block performing a different function, it ismerely an embodiment and not limited thereto. For example, thecontroller 1 j-10 itself may perform a function of the demultiplexer 1j-15.

FIG. 1K is a block diagram of a BS in a wireless communication system,according to an embodiment of the present disclosure.

The BS of FIG. 1K may include a transceiver 1 k-05, a controller 1 k-10,a multiplexer and demultiplexer 1 k-20, a control message processor 1k-35, various higher layer processors 1 k-25 and 1 k-30, and a scheduler1 k-15.

Referring to FIG. 1K, the transceiver 1 k-05 may transmit data andcertain control signals on a forward carrier, and receive data andcertain control signals on a backward carrier. If multiple carriers areset up, the transceiver 1 k-05 may perform data transmission andreception and control signal transmission and reception with themultiple carriers. The multiplexer and demultiplexer 1 k-20 may serve tomultiplex data generated in the higher layer processing units 1 k-25 and1 k-30 or the control message processor 1 k-35 or demultiplex datareceived from the transceiver 1 k-05 and deliver the multiplexing ordemultiplexing result to the higher layer processors 1 k-25 and 1 k-30,the control message processor 1 k-35, or the controller 1 k-10. Thecontrol message processor 1 k-35 may receive an instruction from thecontroller 1 k-10 to create a control message and deliver the controlmessage to a lower layer. The higher layer processors 1 k-25 and 1 k-30may be configured for each service of each UE, and process datagenerated in user services, such as FTP or VoIP and deliver the resultto the multiplexer and demultiplexer 1 k-20, or process data deliveredfrom the multiplexer and demultiplexer 1 k-20 and deliver the result toa higher layer service application. The scheduler 1 k-15 may allocatetransmission resources to the UE at a proper point of time by takinginto account a buffer status of the UE, a channel condition, Active Timeof the UE, etc., and handle the transceiver to process signalstransmitted from the UE or transmit signals to the UE.

FIG. 2 is a block diagram illustrating a configuration of a UE in awireless communication system, according to an embodiment of the presentdisclosure.

As shown in FIG. 2 , the UE of the present disclosure may include aprocessor 230, a transceiver 210, and a memory 220. Components of the UEare not, however, limited thereto. For example, the UE may include moreor fewer elements than elements described above. In addition, thetransceiver 210, the memory 220, and the processor 230 may beimplemented in a single chip.

In an embodiment, the processor 230 may control a series of processesfor the UE to be operated according to the aforementioned embodiments ofthe present disclosure. For example, it may control the components ofthe UE to perform the method of reporting UE capability according to anembodiment of the present disclosure. The processor 230 may be providedin the plural, which may perform the aforementioned operation forreporting UE capability of the present disclosure by carrying out aprogram stored in the memory 220.

The transceiver 210 may transmit or receive signals to or from a BS. Thesignals to be transmitted to or received from the BS may include controlinformation and data. The transceiver 210 may include an RF transmitterfor up-converting the frequency of a signal to be transmitted andamplifying the signal and an RF receiver for low-noise amplifying areceived signal and down-converting the frequency of the receivedsignal. It is merely an example, and the elements of the transceiver 210are not limited to the RF transmitter and RF receiver. In addition, thetransceiver 210 may receive a signal on a wireless channel and outputthe signal to the processor 230, and transmit a signal output from theprocessor 230 on a wireless channel.

In an embodiment, the memory 220 may store a program and data requiredfor operation of the UE. Furthermore, the memory 220 may store controlinformation or data included in a signal transmitted or received by theUE. The memory 220 may include a storage medium such as a read onlymemory (ROM), a random access memory (RANI), a hard disk, a compact discROM (CD-ROM), and a digital versatile disk (DVD), or a combination ofstorage mediums. Moreover, the memory 220 may be in the plural. In anembodiment, the memory 220 may store a program to perform theaforementioned operation of reporting UE capability of theaforementioned embodiments of the present disclosure.

FIG. 3 is a block diagram illustrating a configuration of a BS in awireless communication system, according to an embodiment of the presentdisclosure.

FIG. 3 is a block diagram of a BS, according to an embodiment of thepresent disclosure.

Referring to FIG. 3 , the BS may include a processor 330, a transceiver310, and a memory 320. Components of the BS are not, however, limitedthereto. For example, the BS may include more or fewer elements thandescribed above. In addition, the transceiver 310, the memory 320, andthe processor 330 may be implemented in a single chip.

The processor 330 may control a series of processes for the BS to beoperated according to the embodiments of the present disclosure. Forexample, the processor may control the components of the BS to perform amethod of receiving and analyzing UE capability information in awireless communication system according to embodiments of the presentdisclosure. The processor 330 may be provided in the plural, which mayperform the method of receiving and analyzing UE capability informationin a wireless communication system as described above by carrying out aprogram stored in the memory 320.

The transceiver 310 may transmit or receive signals to or from a UE. Thesignals to be transmitted to or received from the UE may include controlinformation and data. The transceiver 310 may include an RF transmitterfor up-converting the frequency of a signal to be transmitted andamplifying the signal and an RF receiver for low-noise amplifying areceived signal and down-converting the frequency of the receivedsignal. It is merely an example, and the elements of the transceiver 310are not limited to the RF transmitter and RF receiver. In addition, thetransceiver 310 may receive a signal on a wireless channel and outputthe signal to the processor 330, and transmit a signal output from theprocessor 330 on a wireless channel.

In an embodiment, the memory 320 may store a program and data requiredfor operation of the BS. Furthermore, the memory 320 may store controlinformation or data included in a signal transmitted or received by theBS. The memory 320 may include a storage medium such as a ROM, a RAM, ahard disk, a CD-ROM, and a DVD, or a combination of storage mediums.Moreover, the memory 320 may be in the plural. In an embodiment, thememory 320 may store a program to receive and analyze UE capabilityinformation in a wireless communication system in the aforementionedembodiments of the present disclosure.

According to an embodiment of the present disclosure, a UE operationmethod in a wireless communication system includes receiving a UEcapability inquiry message including information about an NR frequencyband from a BS, generating UE capability information by considering anadditional UE capability supported for an SUL as being equal to anadditional UE capability supported for FDD when the information aboutthe NR frequency band includes information about a frequency bandrelated to the SUL and the UE supports the frequency band related to theSUL, and transmitting the generated UE capability information to the BS.

According to an embodiment, the generating of the UE capabilityinformation by considering the additional UE capability supported forSUL as being equal to the additional UE capability supported for FDD mayinclude identifying whether an additional UE capability different from acommon UE capability is supported for the SUL, configuring a parameterrelated to the additional UE capability supported for the FDD in FDDadditional UE capability information, when the additional UE capabilitydifferent from the common UE capability is supported for the SUL, andgenerating the UE capability information to include the FDD additionalUE capability information.

According to an embodiment, the FDD additional UE capability informationmay be information for reporting the additional UE capability supportedfor the FDD when the UE supports the FDD and TDD and the FDD and the TDDhave an additional UE capability different from the common UEcapability.

According to an embodiment, the UE operation method in the wirelesscommunication system may further include configuring a common UEcapability related to the NR frequency band based on the UE capabilityinquiry message.

According to an embodiment, the common UE capability may include a UEcapability applied to the UE regardless of duplex mode and frequencyband.

According to an embodiment, the UE operation method in the wirelesscommunication system may further include generating UE capabilityinformation by considering an additional UE capability supported for SDLas being equal to an additional UE capability supported for TDD when theinformation about the NR frequency band includes information about afrequency band related to the SDL and the UE supports the frequency bandrelated to the SDL.

According to an embodiment, the generating of the UE capabilityinformation by considering the additional UE capability supported forSDL as being equal to the additional UE capability supported for TDD mayinclude identifying whether an additional UE capability different from acommon UE capability is supported for the SDL, configuring a parameterrelated to the additional UE capability supported for the TDD in TDDadditional UE capability information, when the additional UE capabilitydifferent from the common UE capability is supported for the SDL, andgenerating the UE capability information to include the TDD additionalUE capability information.

According to an embodiment of the present disclosure, a UE in a wirelesscommunication system includes a transceiver, and at least one processorconfigured to receive a UE capability inquiry message includinginformation about an NR frequency band from a BS, generate UE capabilityinformation by considering an additional UE capability supported for SULas being equal to an additional UE capability supported for FDD when theinformation about the NR frequency band includes information about afrequency band related to the SUL and the UE supports the frequency bandrelated to the SUL, and transmit the generated UE capability informationto the BS.

According to an embodiment, the at least one processor may identifywhether an additional UE capability different from a common UEcapability is supported for the SUL, configure a parameter related tothe additional UE capability supported for the FDD in FDD additional UEcapability information, when the additional UE capability different fromthe common UE capability is supported for the SUL, and generate the UEcapability information to include the FDD additional UE capabilityinformation.

According to an embodiment, the FDD additional UE capability informationmay be information for reporting the additional UE capability supportedfor the FDD when the UE supports the FDD and TDD and the FDD and the TDDhave an additional UE capability different from the common UEcapability.

According to an embodiment, the at least one processor may configure acommon UE capability related to the NR frequency band based on the UEcapability inquiry message.

According to an embodiment, the common UE capability may include a UEcapability applied to the UE regardless of duplex mode and frequencyband.

According to an embodiment, the at least one processor may generate UEcapability information by considering an additional UE capabilitysupported for an SDL as being equal to an additional UE capabilitysupported for TDD when the information about the NR frequency bandincludes information about a frequency band related to the SDL and theUE supports the frequency band related to the SDL.

According to an embodiment, the at least one processor may identifywhether an additional UE capability different from a common UEcapability is supported for the SDL, configure a parameter related tothe additional UE capability supported for the TDD in TDD additional UEcapability information, when the additional UE capability different fromthe common UE capability is supported for the SDL, and generate the UEcapability information to include the TDD additional UE capabilityinformation.

Methods according to the claims of the present disclosure or theembodiments of the present disclosure described in the specification maybe implemented in hardware, software, or a combination of hardware andsoftware.

When implemented in software, a computer-readable storage medium orcomputer program product storing one or more programs (software modules)may be provided. The one or more programs stored in thecomputer-readable storage medium or computer program product areconfigured for execution by one or more processors in an electronicdevice. The one or more programs may include instructions that cause theelectronic device to perform the methods in accordance with the claimsof the present disclosure or the embodiments described in thespecification.

The programs (software modules, software) may be stored in a RAM, anon-volatile memory including a flash memory, a ROM, an electricallyerasable programmable ROM (EEPROM), a magnetic disc storage device, aCD-ROM, a DVD or other types of optical storage device, and/or amagnetic cassette. Alternatively, the programs may be stored in a memoryincluding a combination of some or all of them. There may be a pluralityof memories.

The program may also be stored in an attachable storage device that maybe accessed over a communication network including the Internet, anintranet, a local area network (LAN), a wide LAN (WLAN), or a storagearea network (SAN), or a combination thereof. The storage device may beconnected to an apparatus for performing the embodiments of the presentdisclosure through an external port. Furthermore, an extra storagedevice in the communication network may access a device that performsthe embodiments of the present disclosure.

In the present disclosure, the term ‘computer program product’ or‘computer-readable recording medium’ is used to generally indicate amedium such as a memory, a hard disc installed in a hard disc drive, anda signal. The computer program product or computer-readable recordingmedium is a device provided for the method of reporting UE capabilityaccording to the present disclosure.

In the embodiments of the present disclosure, a component is representedin a singular or plural form. It should be understood, however, that thesingular or plural representations are selected appropriately accordingto the situations presented for convenience of explanation, and thepresent disclosure is not limited to the singular or plural form of thecomponent. Further, the component expressed in the plural form may alsoimply the singular form, and vice versa.

Several embodiments of the present disclosure have been described, but aperson of ordinary skill in the art will understand and appreciate thatvarious modifications can be made without departing the scope of thepresent disclosure. Thus, it will be apparent to those of ordinary skillin the art that the present disclosure is not limited to the embodimentsof the present disclosure, which have been provided only forillustrative purposes. Furthermore, the embodiments may be operated bybeing combined with one another if necessary. For example, an embodimentof the present disclosure and some of another embodiment of the presentdisclosure may be combined to operate the BS and the UE. The embodimentsof the present disclosure may be equally applied to other communicationsystems, and other modifications of the embodiments may also be madewithout departing from the scope of the present disclosure. For example,the embodiments of the present disclosure may also be applied to an LTEsystem, 5G or NR system, etc.

Several embodiments of the present disclosure have thus been described,but it will be understood that various modifications can be made withoutdeparting the scope of the present disclosure. Thus, it will be apparentto those of ordinary skill in the art that the present disclosure is notlimited to the embodiments described, but can encompass not only theappended claims but the equivalents.

1. An operation method of a user equipment (UE) in a wirelesscommunication system, the operation method comprising: receiving a UEcapability inquiry message including information about a new radio (NR)frequency band from a base station (BS); generating UE capabilityinformation by considering an additional UE capability supported for asupplementary uplink (SUL) as being equal to an additional UE capabilitysupported for frequency divisional duplex (FDD) when the informationabout the NR frequency band includes information about a frequency bandrelated to the SUL and the UE supports the frequency band related to theSUL; and transmitting the generated UE capability information to the BS.2. The operation method of claim 1, wherein the generating of the UEcapability information by considering the additional UE capabilitysupported for the SUL as being equal to the additional UE capabilitysupported for FDD comprises: identifying whether an additional UEcapability different from a common UE capability is supported for theSUL; configuring a parameter related to the additional UE capabilitysupported for the FDD in FDD additional UE capability information, whenthe additional UE capability different from the common UE capability issupported for the SUL; and generating the UE capability information toinclude the FDD additional UE capability information.
 3. The operationmethod of claim 2, wherein the FDD additional UE capability informationcomprises information for reporting the additional UE capabilitysupported for the FDD when the UE supports the FDD and time divisionduplex (TDD) and the FDD and the TDD have an additional UE capabilitydifferent from the common UE capability.
 4. The operation method ofclaim 1, further comprising: configuring a common UE capability relatedto the NR frequency band based on the UE capability inquiry message. 5.The operation method of claim 4, wherein the common UE capabilitycomprises a UE capability applied to the UE regardless of duplex modeand frequency band.
 6. The operation method of claim 1, furthercomprising: generating UE capability information by considering anadditional UE capability supported for a supplementary downlink (SDL) asbeing equal to an additional UE capability supported for time divisionalduplex (TDD) when the information about the NR frequency band includesinformation about a frequency band related to the SDL and the UEsupports the frequency band related to the SDL.
 7. The operation methodof claim 6, wherein the generating of the UE capability information byconsidering the additional UE capability supported for SDL as beingequal to the additional UE capability supported for TDD comprises:identifying whether an additional UE capability different from a commonUE capability is supported for the SDL; configuring a parameter relatedto the additional UE capability supported for the TDD in TDD additionalUE capability information, when the additional UE capability differentfrom the common UE capability is supported for the SDL; and generatingthe UE capability information to include the TDD additional UEcapability information.
 8. A user equipment (UE) in a wirelesscommunication system, the UE comprising: a transceiver; and at least oneprocessor configured to receive a UE capability inquiry messageincluding information about a new radio (NR) frequency band from a basestation (BS) through the transceiver; generate UE capability informationby considering an additional UE capability supported for a supplementaryuplink (SUL) as being equal to an additional UE capability supported forfrequency divisional duplex (FDD) when the information about the NRfrequency band includes information about a frequency band related tothe SUL and the UE supports the frequency band related to the SUL; andtransmit the generated UE capability information to the BS through thetransceiver.
 9. The UE of claim 8, wherein the at least one processor isconfigured to: identify whether an additional UE capability differentfrom a common UE capability is supported for the SUL; configure aparameter related to the additional UE capability supported for the FDDin FDD additional UE capability information, when the additional UEcapability different from the common UE capability is supported for theSUL; and generate the UE capability information to include the FDDadditional UE capability information.
 10. The UE of claim 9, wherein theFDD additional UE capability information comprises information forreporting the additional UE capability supported for the FDD when the UEsupports the FDD and time division duplex (TDD) and the FDD and the TDDhave an additional UE capability different from the common UEcapability.
 11. The UE of claim 8, wherein the at least one processor isconfigured to configure a common UE capability related to the NRfrequency band based on the UE capability inquiry message.
 12. The UE ofclaim 11, wherein the common UE capability comprises a UE capabilityapplied to the UE regardless of duplex mode and frequency band.
 13. TheUE of claim 8, wherein the at least one processor is configured togenerate UE capability information by considering an additional UEcapability supported for a supplementary downlink (SDL) as being equalto an additional UE capability supported for time divisional duplex(TDD) when the information about the NR frequency band includesinformation about a frequency band related to the SDL and the UEsupports the frequency band related to the SDL.
 14. The UE of claim 13,wherein the at least one processor is configured to: Identify whether anadditional UE capability different from a common UE capability issupported for the SDL; configure a parameter related to the additionalUE capability supported for the TDD in TDD additional UE capabilityinformation, when the additional UE capability different from the commonUE capability is supported for the SDL; and generate the UE capabilityinformation to include the TDD additional UE capability information.